Belt tightener for sawmill feed mechanism



March 26, 1929. D. F. GOOD f 1,707,119

BELT TIGHTENER FOR SAW MILL FEED MECHANISM Filed April 20, 1927 2 Sheets-Sheet 1 gwuwntoz I l am'elfo od D. F. GOOD Mmh 26, 1929.

BELT TIGHTENER FOR SAW MILL FEED MECHANISM 2 Sheets-Sheet 2 Filed April 20, 1927 3mm I 1121125911 Good 3'pivotally supported by a bracket 424:. The

operating lever 43 is held in neutral position by means of a spring 45, which engages a notch inthe'lever adjacent its lower end. On the opposite side of the shaft 11 from pulleys 23 and 31 a pulley 4L6 is mounted in brackets l7 pivoted at d8 upon the frame 10, said brackets 47 being provided with arcuate slots e9 in V which are disposed screws 50 for holding the brackets 1n proper adjusted position. This construction pe units the pulley as to be swung longitudinally of the frame toward "and away 7 from the pulley 25, opposite which it is disposed. The belt'27 extends around the'pulley 25 by means of which it is driven, around 7 and over the pulley 31, and about the pulleys 41G and28.

. WVhen the parts are in the position shown in Figure 2, the belts 26 and 27 are loose and thepulleys 24c and25 rotate freely within said belt-s. The movement of the operating lever '43 to the right causes the p'ulley3l to draw the belt 27'into engagement with thepulley 25 in proportion tothe'amou'nt the lever is operated, whereupon considerable friction between the belt and the pulley is caused and the'feedingmechanism moves toward the saw in a manner controlled entirely by the slipping of the belt up to the full speed of the feedwhich, of course, depends upon the size oi the log being out," A movementof the lever beyond the neutral position in a reverse direction releases the. belt 27 and causes the pulley 30 to press-downwardly upon the belt 26 and drawthe same taut, whereupon frietion between the pulley 24 and the belt drives the belt and the pulley .26 and carriage in the .IQVOLSL),ClllCtlOIl it a greatly increased speed.

adjustment'oi' thefeed beltQ? or the reverse arms having cutting either belt or without increasing the length of movement of the operating lever 4-3. However, the lever and the connecting described in the specification, but only as set forth in the appended claim.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

A belt tightoner for w mill. feed mechanism comprising supporting means, a yoke includin a rod-like body having parallel legs engaging said supporting means, a pair of arms extending laterally from one side of said rod like body, a pulley journallod between the outer ends of said arms, a short leg mounted on said body between the legs of the joke, a having one end supported in said short leg and having its other end supported in one of the legs oi the yoke, a pair of arms pivoted on said shaft and extending laterally on the opposite side of the yoke from the first-mentioned arms, one of said pivoted acurvod slot, a pulley journalled between said arms, and a fastening element carried by one of the legs of the yoke for cooperation with said curved slot for permitting adjustment of the pulley about the shaft supported in the legs of the yoke and rotatable with the yoke about its support, substantially as set forth.

DANIEL F. G 00]). 

